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MissTica
2 years ago
10

A 2.5 L container is filled with propane. The ambient temperature is 25°C and the

Chemistry
2 answers:
vlabodo [156]2 years ago
6 0

Answer:

3.3atm is the new pressure of the container

Explanation:

In the car, the temperature of the container increases from 25°C  =298K to 55°C = 328K. To solve this question we must use the Boyle's law that state that the pressure of a gas is directly proportional to its absolute temperature under constant volume. The equation is:

P1T2 = P2T1

<em>Where P is pressure and T absolute temperature of 1, initial state of the gas and 2, final state.</em>

<em />

Replacing:

P1 = 3atm

T2 = 328K

P2 = ?

T1 = 298K

3atm*328K = P2*298K

P2 = 3.3atm is the new pressure of the container

<em />

egoroff_w [7]2 years ago
4 0

Answer:

3.3 atm

Explanation:

First we <u>convert 25 °C and 55 °C to K</u>:

  • 25 °C + 273.16 = 298.16 K
  • 55 °C + 273.16 = 328.16 K

We can solve this problem by using Gay Lussac's law, which states that at constant volume:

  • T₁P₂=T₂P₁

Where in this case:

  • T₁ = 298.16 K
  • P₂ = ?
  • T₂ = 328.16 K
  • P₁ = 3 atm

We <u>input the data</u>:

  • 298.16 K * P₂ = 328.16 K * 3 atm

And <u>solve for P₂</u>:

  • P₂ = 3.3 atm
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Answer:

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We can draw a chart (please view this on desktop so to avoid spacing errors):

Let the mass of Epinephrine be 100g.

                             C                       H                          O                              N

mass(g) :              59                      7.15                    26.2                         7.65

no. of moles : 59/12 =4.9167     7.15/1 = 7.15     26.2/16=1.6375 7.65/14=0.5464

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Ratio:   4.9167/0.5464 =9    7.15/0.5464=13      1.6375= 3      0.5464/0.5464 =1

(divide the n.o.m. by the smallest n.o.m., which is 0.5464 in this case, take the whole numbers)

So, the empirical formula will be: C9H13O3N

But this is still not yet the molecular formula. We have to ensure the molar mass is 183g/mol. Multiply the empirical formula by n.

So, let the molecular formula of Epinephrine be (C9H13O3N)n.

12x9n + 1x13n + 16x3n + 14n = 183

108n + 13n + 48n + 14n = 183

183 n = 183.

n = 1

Hence, the molecular formula is C9H13O3N.

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